Microsoft 365 Core MCP Server

# Security Remediation Report **Date:** 2025-07-13 **Initial Security Score:** 73/100 (Moderate Risk) **Post-Remediation Status:** Significantly Improved ## Summary Successfully addressed the majority of security vulnerabilities identified in the MseeP.ai security assessment. Reduced total vulnerabilities from **16** to **1**, eliminating all medium severity issues and most high severity issues. ## Vulnerabilities Addressed ### ✅ **RESOLVED: @azure/identity** (Medium Severity) - **Issue:** Azure Identity Libraries and Microsoft Authentication Library Elevation of Privilege Vulnerability - **CVE:** GHSA-m5vv-6r4h-3vj9 - **CVSS Score:** 5.5 - **Action:** Updated from `^3.3.0` to `^4.2.1` - **Status:** ✅ **FIXED** ### ✅ **RESOLVED: @babel/runtime** (Medium Severity) - **Issue:** Babel has inefficient RegExp complexity in generated code with .replace when transpiling named capturing groups - **CVE:** GHSA-968p-4wvh-cqc8 - **CVSS Score:** 6.2 - **Action:** Updated via puppeteer dependency update - **Status:** ✅ **FIXED** ### ✅ **RESOLVED: @puppeteer/browsers & tar-fs** (High Severity) - **Issue:** Multiple vulnerabilities in puppeteer dependencies - **Action:** Updated puppeteer from `^21.0.0` to `^23.8.0` - **Status:** ✅ **FIXED** ### ✅ **RESOLVED: Multiple Transitive Dependencies** - **Issues:** Various vulnerabilities in: - `node-fetch` (high severity) - `ws` (high severity) - `tar-fs` (high severity) - `lodash.pick` (high severity) - `nth-check` (high severity) - `brace-expansion` (low severity) - **Action:** Applied `npm audit fix --force` to update vulnerable dependencies - **Status:** ✅ **FIXED** ## Remaining Vulnerability ### ⚠️ **REMAINING: xlsx** (High Severity) - **Issue:** Prototype Pollution in sheetJS & Regular Expression Denial of Service (ReDoS) - **CVE:** GHSA-4r6h-8v6p-xvw6, GHSA-5pgg-2g8v-p4x9 - **Current Version:** `^0.18.5` - **Status:** ⚠️ **NO FIX AVAILABLE** (per npm audit) - **Risk Assessment:** This package is used for Excel file processing in audit reports - **Mitigation:** Consider alternative packages like `exceljs` or `node-xlsx` for future updates ## Actions Taken 1. **Updated @azure/identity:** `^3.3.0` → `^4.2.1` 2. **Updated puppeteer:** `^21.0.0` → `^23.8.0` 3. **Applied npm audit fix:** Resolved transitive dependency vulnerabilities 4. **Applied npm audit fix --force:** Resolved remaining fixable vulnerabilities with breaking changes ## Security Improvement - **Before:** 16 vulnerabilities (1 low, 1 moderate, 14 high) - **After:** 1 vulnerability (1 high) - **Improvement:** **93.75% reduction** in total vulnerabilities - **Eliminated:** All medium severity vulnerabilities - **Eliminated:** 13 out of 14 high severity vulnerabilities ## Recommendations 1. **Monitor xlsx vulnerability:** Keep watching for updates to the `xlsx` package that address the remaining vulnerabilities 2. **Consider alternative Excel libraries:** Evaluate `exceljs` or `node-xlsx` as potential replacements for `xlsx` 3. **Regular security audits:** Run `npm audit` regularly to catch new vulnerabilities 4. **Automated dependency updates:** Consider using tools like Dependabot or Renovate for automated security updates ## Verification To verify the current security status, run: ```bash npm audit ``` Expected output should show only 1 high severity vulnerability in the `xlsx` package. --- **Security Assessment Conducted By:** MseeP.ai **Remediation Completed By:** Development Team **Next Review Date:** Recommended within 30 days